What CMS is this website using?
One of the most common reasons to check a site's technology is simply to answer "what is this built on?" — is it WordPress, Shopify, Wix, Squarespace, Webflow, or a custom setup? This tool reads the website's public homepage and looks for the tell-tale signatures that different platforms leave behind: script paths, class names, meta tags, and asset URLs that identify a content management system, e-commerce engine, or JavaScript framework. Enter a domain above and it reports what it can detect.
How website technology detection works
Every platform leaves fingerprints. WordPress serves files from /wp-content/; Shopify sites reference cdn.shopify.com; React apps ship a recognisable runtime; Tailwind CSS produces distinctive utility class names. By fetching a site's homepage HTML and matching these patterns, a technology checker can identify much of the stack without any special access — the same passive approach that tools like BuiltWith and Wappalyzer use. It's a fast, free way to check website technology when you're researching a competitor, vetting a potential partner, or just curious how a site you admire was made.
What it can and can't see — an honest note
Technology detection is inherently a best-effort read, not a guarantee, and it's worth being clear about the limits. It only sees what's in the public homepage HTML — technology loaded later by JavaScript, hidden behind a login, or running purely server-side may not appear. Sites behind a proxy or CDN (like Cloudflare) can mask some signals. And a site can deliberately hide its stack. So results are best read as "this site appears to use X," and an absence of detection doesn't prove a technology isn't there. We also don't report version numbers as a rule — they're frequently hidden, stale, or spoofable, so a confident "running version X.Y" would often be wrong. This tool tells you what a site appears to be built with, factually, without guessing at details it can't verify.
Common uses
Marketers use it to see whether a competitor runs Shopify or WooCommerce before pitching a migration. Developers check which framework a site they admire is built on. Agencies vet a prospective client's existing stack. And anyone evaluating a tool or template can confirm what a showcase site actually uses. In every case the value is the same: a quick, honest read of a site's technology, free, from its public footprint.
What about the web server?
Where a site exposes them, this tool also reports its server response headers — the Server header (which may name Nginx, Apache, IIS, or LiteSpeed) and X-Powered-By (which sometimes reveals a backend like PHP or ASP.NET). We read these over a direct connection to the server, so the value is the real one the site returns. Two honest limits still apply. First, if a site sits behind a CDN or proxy such as Cloudflare, Fastly, or Akamai, the header names the proxy and the true origin server is hidden behind it — that's the case for a large share of the modern web, and no external tool can see past it. Second, many servers deliberately strip or genericise these headers as a hardening step, so they're often absent. We report what the server actually returns, labelled honestly — a CDN is shown as a CDN, not mistaken for the origin — and we never guess at a server or backend the headers don't reveal.